Go Back   DodgeForum.com > Dodge Trucks > Dodge Ram > 2nd Gen Ram Tech
Sign in using an external account
Register Forgot Password?


2nd Gen Ram Tech 1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

Max RPM's 1200

Reply
 
 
 
 
Thread Tools Search this Thread
  #1  
Old 07-05-2013, 04:37 PM
Beau's Avatar
Beau Beau is offline
Amateur
 
Join Date: Aug 2011
Vehicle: 05 GMC
Location: Louisiana
Posts: 28
Default Max RPM's 1200


I am having trouble with a 1996 Ram 1500 with a 5.9L. Itwill idle great and with light throttle you can get the RPM’s to about 1200.Any more and all it does is suck more air and starts missing. The truck hasbeen parked for about 4 months. It also has transmission problems, the reasonit was parked, but at that time it ran great. First thought was it had jumped timing,which checked out and is OK. Want to check fuel pressure but the fuel rail hasno Schrader valve. I think I have a fuel problem and would like to checkpressure before dropping the tank.

Also can the transmission cause any symptoms like I amseeing? THANKS
This ad is not displayed to registered and logged-in members.
Register your free account today and become a member on Dodge Forums!
Reply With Quote
  #2  
Old 07-05-2013, 04:57 PM
dodge dude94 dodge dude94 is offline
Banned
 
Join Date: Jun 2010
Vehicle: 1998 Ram 1500 QCSB 360 4x4
Location: East Texas
Posts: 8,923
Default

Sounds like fuel pressure or a clogged cat to me.
Reply With Quote
  #3  
Old 07-05-2013, 05:16 PM
Beau's Avatar
Beau Beau is offline
Amateur
 
Join Date: Aug 2011
Vehicle: 05 GMC
Location: Louisiana
Posts: 28
Default

Do you think the cat could plug while parked? Still need to find out how to check for fuel pressure. Thanks for the quick reply

Last edited by Beau; 07-05-2013 at 05:17 PM.. Reason: typo
Reply With Quote
  #4  
Old 07-05-2013, 05:22 PM
Arde Arde is offline
All Star
 
Join Date: Jul 2011
Vehicle: '95 Ram 1500 360 4x4
Location: Dayton, TX.
Posts: 892
Default

Unscrew the pre-cat O2 sensor and see if it doesn't run better to check the cat. I think the auto parts stores sell a kit to test fuel pressure on the trucks without a schrader valve, but don't quote me on that.
Reply With Quote
  #5  
Old 07-05-2013, 05:29 PM
zman17's Avatar
zman17 zman17 is offline
Registered User
Dodge Forum Moderator
 
Join Date: May 2008
Vehicle: 2000 2500HD 4x4 5.9
Location: NH
Posts: 18,729
Default

You have a black plastic fuel rail? Only 97's should have that. I have the adapter, but no auto parts store that I know of will have it. Had to order it special. And +1 on unscrewing the precat o2 from the pipe.
__________________
2000 2500HD 4X4 5.9 and 4:10's,HF tuned SCT,Red-Head gear box, HS 1.7's,
50mm Fastman TB, Hughes Plate,2" Hell Bent ,Volant CAI
Flowmaster 50 series, Rock Solid Ram Steering fix,B&M trans cooler,fuzzy dice good for 5HP
Reply With Quote
  #6  
Old 07-05-2013, 06:21 PM
Beau's Avatar
Beau Beau is offline
Amateur
 
Join Date: Aug 2011
Vehicle: 05 GMC
Location: Louisiana
Posts: 28
Default

After some creative thinking I was able to check the fuel pressure. At idle I have 48# fuel pressure, had a leak so I had to shut it down, did not check pressure above idle, going pull the O2 sensor and see. Thanks again
Reply With Quote
  #7  
Old 07-05-2013, 06:29 PM
zman17's Avatar
zman17 zman17 is offline
Registered User
Dodge Forum Moderator
 
Join Date: May 2008
Vehicle: 2000 2500HD 4x4 5.9
Location: NH
Posts: 18,729
Default

You need to fix the leak so you can check and see how fast it loses pressure after you shut the motor off. And do you have the plastic fuel rail? You should get a build sheet. http://www.dodge.com/wccsapp/univers...ull&category=R
__________________
2000 2500HD 4X4 5.9 and 4:10's,HF tuned SCT,Red-Head gear box, HS 1.7's,
50mm Fastman TB, Hughes Plate,2" Hell Bent ,Volant CAI
Flowmaster 50 series, Rock Solid Ram Steering fix,B&M trans cooler,fuzzy dice good for 5HP
Reply With Quote
  #8  
Old 07-05-2013, 06:40 PM
Beau's Avatar
Beau Beau is offline
Amateur
 
Join Date: Aug 2011
Vehicle: 05 GMC
Location: Louisiana
Posts: 28
Default

Fuel rail is metal just no valve. When shut-down the pressure dropped about inline with leak. Can I post a video here
Reply With Quote
  #9  
Old 07-05-2013, 06:42 PM
dhvaughan's Avatar
dhvaughan dhvaughan is offline
Hall Of Fame
 
Join Date: Jul 2006
Vehicle: 01 1500 4wd
Location: Gainesville, Ga.
Posts: 12,207
Default

upload the video to photobucket or similar hosting site.
then put a link to it in your post.
__________________
01 1500 Reg Cab 4wd 5.2 auto 3.55 285/75/16 steps tow hooks sc3815 180 3923 trans cooler filter posilok powertrax (removed) timbren britebox pioneer head rockford amp speaker cobra cb firestick hughes plenum water pump timing chain oil pump rear main hub bearings brakes shocks cracked dash cad bushings seals ujoints trackbar tcase Robert Griffin Trans
Reply With Quote
  #10  
Old 07-05-2013, 06:44 PM
dhvaughan's Avatar
dhvaughan dhvaughan is offline
Hall Of Fame
 
Join Date: Jul 2006
Vehicle: 01 1500 4wd
Location: Gainesville, Ga.
Posts: 12,207
Default

if you have 48# of fuel pressure when its running, that's normal. no need to work on fuel anymore other than to put it back together and not have a leak.

your problem is most likely clogged cat. remove front O2 as suggested.
__________________
01 1500 Reg Cab 4wd 5.2 auto 3.55 285/75/16 steps tow hooks sc3815 180 3923 trans cooler filter posilok powertrax (removed) timbren britebox pioneer head rockford amp speaker cobra cb firestick hughes plenum water pump timing chain oil pump rear main hub bearings brakes shocks cracked dash cad bushings seals ujoints trackbar tcase Robert Griffin Trans
Reply With Quote
  #11  
Old 07-05-2013, 06:45 PM
zman17's Avatar
zman17 zman17 is offline
Registered User
Dodge Forum Moderator
 
Join Date: May 2008
Vehicle: 2000 2500HD 4x4 5.9
Location: NH
Posts: 18,729
Default

First time I've heard of the metal rail not having a test port. But if you can't stop the leak in the rig you made, there is no way to test the pump properly. Somehow I don't think that's the prob anyway. You need to check /test/clean the other stuff mentioned.
__________________
2000 2500HD 4X4 5.9 and 4:10's,HF tuned SCT,Red-Head gear box, HS 1.7's,
50mm Fastman TB, Hughes Plate,2" Hell Bent ,Volant CAI
Flowmaster 50 series, Rock Solid Ram Steering fix,B&M trans cooler,fuzzy dice good for 5HP
Reply With Quote
  #12  
Old 07-05-2013, 07:03 PM
Beau's Avatar
Beau Beau is offline
Amateur
 
Join Date: Aug 2011
Vehicle: 05 GMC
Location: Louisiana
Posts: 28
Default

Here is a picture of the truck, not bad for free!http://i1083.photobucket.com/albums/...psbddfe135.jpg

Here is a video under the hood http://s1083.photobucket.com/user/be...07965.mp4.html

This on from inside http://s1083.photobucket.com/user/be...08623.mp4.html

Starting to think it might be the cat, just seems odd the this happened when it was parked
Reply With Quote
  #13  
Old 07-05-2013, 07:14 PM
zman17's Avatar
zman17 zman17 is offline
Registered User
Dodge Forum Moderator
 
Join Date: May 2008
Vehicle: 2000 2500HD 4x4 5.9
Location: NH
Posts: 18,729
Default

Remove the o2 to start with. I'm betting it's the problem(cat), but even if it isn't, you need to eliminate it as one.
__________________
2000 2500HD 4X4 5.9 and 4:10's,HF tuned SCT,Red-Head gear box, HS 1.7's,
50mm Fastman TB, Hughes Plate,2" Hell Bent ,Volant CAI
Flowmaster 50 series, Rock Solid Ram Steering fix,B&M trans cooler,fuzzy dice good for 5HP
Reply With Quote
  #14  
Old 07-05-2013, 07:28 PM
Beau's Avatar
Beau Beau is offline
Amateur
 
Join Date: Aug 2011
Vehicle: 05 GMC
Location: Louisiana
Posts: 28
Default

OK, I pulled the O2 sensor, if it ran any better it is hard to tell. When first started it did rev better for a couple seconds (2 to 3) but with all the exhaust comming out of the O2 port couldn't hear anything else.
With the cat welded in how can I gut it out just to try. What are your thoughts on running gutted cat or no cat? Thanks again
Reply With Quote
  #15  
Old 07-05-2013, 07:33 PM
dhvaughan's Avatar
dhvaughan dhvaughan is offline
Hall Of Fame
 
Join Date: Jul 2006
Vehicle: 01 1500 4wd
Location: Gainesville, Ga.
Posts: 12,207
Default

the real question is - if it would not rev over 1200 rpm before, will it do so now? and rev up to 2000+ rpm?
if you're not sure, put the O2 back in and repeat the test....

if it does, replace the cat (or remove, or gut, or something).
if not, keep looking for the problem, and don't get sidetracked on an unnecessary cat replacement.
__________________
01 1500 Reg Cab 4wd 5.2 auto 3.55 285/75/16 steps tow hooks sc3815 180 3923 trans cooler filter posilok powertrax (removed) timbren britebox pioneer head rockford amp speaker cobra cb firestick hughes plenum water pump timing chain oil pump rear main hub bearings brakes shocks cracked dash cad bushings seals ujoints trackbar tcase Robert Griffin Trans
Reply With Quote
  #16  
Old 07-05-2013, 07:38 PM
Beau's Avatar
Beau Beau is offline
Amateur
 
Join Date: Aug 2011
Vehicle: 05 GMC
Location: Louisiana
Posts: 28
Default

Over 1200RPM's only once when first started without O2 sensor, now it is worse. It will not idle now, drops to about 500RPM and then dies. Running out of daylight, hope to play with it more in the morning.
Reply With Quote
  #17  
Old 07-05-2013, 08:46 PM
Beau's Avatar
Beau Beau is offline
Amateur
 
Join Date: Aug 2011
Vehicle: 05 GMC
Location: Louisiana
Posts: 28
Default

Was able to reinstall the O2 sensor before dark. After trying with and without O2 sensor I see no change in how the truck runs. Do you think the the cat may be so plugged that removing the O2 sensor does no reduce the backpressure enough to let the truck run better? May drop the exhaust at the manifolds and see if that helps. If you have any other ideas let me know.
Reply With Quote
  #18  
Old 07-05-2013, 09:40 PM
HeyYou's Avatar
HeyYou HeyYou is offline
Section Moderator
Dodge Forum Moderator
 
Join Date: Apr 2010
Vehicle: 1996 Dodge Ram 2500
Location: Adrian, MI
Posts: 34,312
Default

Pressure check valve should be on the drivers side toward the back.... being it's a 96 with metal rail, it *should* be there. (capped, of course.)

Sounds like clogged cat.
__________________
1996 Ram 2500 5.9 EC/SB Gas, Auto, 4x4, Hughes plenum plate, Kegger mod, double roller timing set, rest is stock. For now.....
Reply With Quote
  #19  
Old 07-06-2013, 12:43 AM
dhvaughan's Avatar
dhvaughan dhvaughan is offline
Hall Of Fame
 
Join Date: Jul 2006
Vehicle: 01 1500 4wd
Location: Gainesville, Ga.
Posts: 12,207
Default

Quote:
Originally Posted by Beau View Post
Do you think the the cat may be so plugged that removing the O2 sensor does no reduce the backpressure enough to let the truck run better? May drop the exhaust at the manifolds and see if that helps. If you have any other ideas let me know.
i don't think so. the o2 hole should be enough to make a significant improvement. i think you have some other problem other than cat or fuel pressure.
maybe electrical. maybe a vac leak. maybe injectors.
how old is the gas?
__________________
01 1500 Reg Cab 4wd 5.2 auto 3.55 285/75/16 steps tow hooks sc3815 180 3923 trans cooler filter posilok powertrax (removed) timbren britebox pioneer head rockford amp speaker cobra cb firestick hughes plenum water pump timing chain oil pump rear main hub bearings brakes shocks cracked dash cad bushings seals ujoints trackbar tcase Robert Griffin Trans
Reply With Quote
  #20  
Old 07-06-2013, 07:13 AM
Beau's Avatar
Beau Beau is offline
Amateur
 
Join Date: Aug 2011
Vehicle: 05 GMC
Location: Louisiana
Posts: 28
Default

After thinking about the problem overnight, I'm starting to think the problem could still be fuel pressure. At idle pressure is good but once demand for fuel goes up do you think the pressure could drop off (plugged filter). Once it gets daylight I am going to try my set-up again and see if I can stop the leaks. That way I could check fuel pressure at higher RPS and see how fast the pressure bleeds down.
Reply With Quote
Old 07-06-2013, 07:13 AM
 
 
 
Reply




Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Join DodgeForum
Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -4. The time now is 07:47 PM.

© Internet Brands, Inc.


Contact Details & Emails